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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aa675b9007b44402ac41e306b0014e5fa117c33c98a06f683396fe8fdb59836' 
  AND token = 'HWgIk4IuAXR6XxabgDxXCltLqjIPdx044JIAB97c0GA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}