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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62c44750a82ea7d1c0b36ebfb592a9b85d0fdc237b6ff267ba80b09b6dcd84f7' 
  AND token = 'l67E9J9Nq/Pgoci33PnRGQFRHID4kvEAfj5iEt3q46c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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