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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcfb1143f5f665805c952fdff8d4890c2504e120515fc88b5c5d88dc4b4d1ab1' 
  AND token = 'Qf+RQITqcfpf8Wh5NP2JAOF0Ne10hzhXDa4Tuf32qnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00089

JSON explain

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