Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38d72fd52cabc2da7112c89458bfeff0729fbd0ce09a6bb289754548da26adba' 
  AND token = 'dOYLFQTRmkX/U48gDTOWJNOA5Wr2hFNtKlfmGriwlhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}