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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e22f12db4c6fdfd01a0562632e85f2a07fa8a78f8bc95c775ff64cf2994fd7e' 
  AND token = 'NecAQA7jpSPv1DXZPLcA4Y74AUcu7EqGJ7KFkLxU9iA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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