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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '62cd0d26e42ed126c663ea1add281f90e3abc1aea1d7d476a9f46f6b7ca57aa1' 
  AND token = 'PiEZFtrT1mzgxeivLkJ4KOke/vfzF+rmtvNxxKlWVic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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