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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57df0f793ece557e55a654cd28fd73b1ca7208e78f6b514934b384a442f71c35' 
  AND token = 'Ln4q0RQtTCIaqsifYkw2jxcSez3OVqQfrD2ej1tKzyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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