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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09cd1dee1812c39ab2307eb9ceae56d064988daee49dadb1a2a18b65a59d11ed' 
  AND token = 'Elic54OYn6BSDEamUXVOD07HaCgqCcsxYUMduZ/4AfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00157

JSON explain

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