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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95ffd7a99ef93e5b29afc018fd4587d7929aba34e9438c49e6cecb436c9d7f2a' 
  AND token = 'CzC/7VWPO6iU7Pc0G6slF7XZL4QnH/5LZY991mM0q/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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