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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '526ca2a851c4c2e507e179c528774c1e1dad70fde749cd639434481fcc5ddcd9' 
  AND token = 'MJ+f4Lp6cwiY32EHaw0BZkeGwvwso1oDsCYkq7eHEy0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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