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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61158248743aa7f84427c6a6bd55afd7fb0e8ce52f3173f34871bfb7f34105de' 
  AND token = 'yWMYhp6WAk6pWKvA3giey5FZTy2xBUFpS1lg2f3PuBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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