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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ef04fc531ca49d092da0ce27535f01cdee0905232548144f0896023c6c68d8cd' 
  AND token = 'pJ3p8H8C4ttlrj/oRWlZUVnf3m5laP0JRw1Ylxbz/bU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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