SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f14b1648f40e3e0db0ef576931adc5c2033085c74f1b3c3c6ee55848590e2d7' 
  AND token = 'jAY0U02V+V1JD+Zgjsf7O3mwuwDgJ8HRz55J/1CntBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}