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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8aa049d193194e74cbcd9c74d31508fbf722f39bc7a805f53c05cb67b92c38bb' 
  AND token = 'uKU96oa3RG2N3+vOeWg5bgzbdTczLPGx3Qo5+sAI5DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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