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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '024fdde776b74915a6330fb8d88e59d23bc310b709afd0b49b7aea593c41c011' 
  AND token = 'vY/4TNstEkUyx5Ii4kcbZ0zwkWzKkRVERrytzXTP2aQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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