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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1053386c04a4617b21b75cd51ee1b94c3306c18af0432a52432d20b3b0b7372c' 
  AND token = 'XHbxKX6PLXUCP1LJmws97rIZZ4qIR6ootSPkgk/o+i0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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