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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adf745647db1c8613093a2a4c1c33493b5684c56a7195dd043c84904b0920aaa' 
  AND token = 'kJjb5GYury4YDtw2WA/gP6KYtbtui89PHgyuBQbS5l8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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