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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e941e69c96b0a0063693814d0c4383244adb51e162fe5659687b1451b37a57d6' 
  AND token = 'MYeK7Elj77E0vpBpAMiHgf75lD2FaUvcLxHZc+unH6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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