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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fe1922cd640286cc5a77a5557be7724674a0bbb2402c6b7c0f1206508275a35' 
  AND token = '9TcXwpL0kAid8E3N/clScuj+m48Qw03wbq5I8ISIzes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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