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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c0145a75d31626f37d2fc5e08ab5c39042b3969785b1272387cf0de733e8025' 
  AND token = 'jD/3OfQtYQl+wMpb86z4rJdmKUuAs6SonkmNCOyAVO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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