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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3723fa3b099e6d2d0fb927f91d50d9fe26ca90a741de7159f2e6095248fbd029' 
  AND token = 'abpBE3bvsy4kia/mZ3i3F83SUz9FUFefmHum0SjA2Kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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