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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a59e06f14cecd61ac24633c93bd2177bb80b86baa055f60cb63bc0d5ba9486ab' 
  AND token = 'VzZzeWrjO0lMAwegX8P9F3n1naVwwPzu8vMju+zut+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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