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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ab158f5ee8d90b19d8e06d5c36565bab5997bebffce1e94f93cc33cae18fa7e' 
  AND token = 'zrsQv6uX6RKJ+FzLEdxjsR9xTL4AeQSk+t9oHvedYCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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