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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25244ef8287a8803847550dc9b5fed1a6fabc0df8d207422d67a0b1e5ef124b8' 
  AND token = 'D03QoeLlk1KHFKB47HiJ8nd6S/udP0FzgiJLFBobmO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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