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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '133d44943e47e3512de8eb5d77afbbbd2bf403a045f1c0952271c4b49780f39e' 
  AND token = 'hAI19x3+GV5ze4vy6amtcw+nvCt25G7ZrN6A7lx6s0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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