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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e6a235cea7aa8e2e0ea99dfb5ea1aaa7e4608fb77285fe37722c0295418f3da' 
  AND token = '2VcUIDT6V1Du0AnbEixo4wk7QOKgUef+yq/VFwQPYA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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