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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1bf3273aa89f654f6bb667770144c869c57f578bb1c722d1d32a000141deb1c' 
  AND token = 'AxthisdsCArREG+PiKJp9i6F/CkbpNxUGC87bkTRnSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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