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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7bec63a4c65e6d8580fc2831c1f817fa026f044850c90024ebf15463c52124fb' 
  AND token = 'EtOfBK++4qEb8drCpq4Ue46tLYTfE95SvZ2K9TsA9Jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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