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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64f10774e042f923284bcc3a4656c2a42d1ba613f2ff901c43431d70d6011443' 
  AND token = 'bO+9oFXIuajuEOXaRhDiafnKzVhzVHX9FWClL+h+Arc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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