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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6ff0da5e4fa63a28d1901d9d96867438e4651fd8364917e1c54a2d69a128e860' 
  AND token = 'UENZxo/5a9M8K/k/7exixBbPPi3PVYgj7Ot23X1gUTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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