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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e4b29349306ec6d6a9ea11f44aee2b4efe25a6229609dee459fbbfb86b4dded' 
  AND token = 'Tof7Eq5YaVbMg4XmMQV6sBfdArNNOKAZEQYJqQqpnxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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