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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '34245a55d2f4b9c79bfaaf90dc9314154ece19cf1f5c1bafbbb7cb9d61e110c6' 
  AND token = 'yTf/dYsOB74eoWaCVnxvMqwrhICILalu+meOZjaO7OI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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