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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e97203e2192ee74bd6573a93269f2e3802b624195a7596e37155c46ac7ba14dd' 
  AND token = 's4indG0MT6mWeY/wTUhTzKV2BTBVZgm1WWMhEHXCITU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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