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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e19594c53121e080a0e9ca602464276210be9955018313d9ce07f7c51177cbd4' 
  AND token = 'IpbTz91l08mDFTNYye8x4UcamIXuXuz+f5yIBDCmnA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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