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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bd110d6bd62ba0095afb62f7b72cece62d939c6a8705911c738fc88c7004041' 
  AND token = 'YWfKLsaJfAKR/od5wwfLLMfGNYNoyDb7rNUJZj3ILH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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