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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b2e2f5dfbd3fc1e75eeae160157af7fbef1d33bff6b30d646ff11a6b19f8ddb' 
  AND token = 'wGwKXiIf8xGdpcxO++C+s+4IBKLXjIZ6gG/gl88E2Sc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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