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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2360c77634bb27dc0234fb8616294d1c4657d43bc6df7f04218ef7e663948c6' 
  AND token = 'oEqibCliq086/yGGNLkZmz2RrixERSjVpd032OOHGIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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