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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9aa302e5ec766a5edd5e46f90347b3b73ef8cd8de53e0832266aa930cf32df64' 
  AND token = 'a8+X9z4KljxtNt/jF3v5U40AfN/eiWmVXE0f4oR4f5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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