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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc3eaad344e1669ae51192745c30cb2ac45bf562b135a15358defc0af1ec9e81' 
  AND token = 'In04NlicSOcGKuqcOA0kwd4i84RGgZ/OjB/tKAkGDLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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