Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ee3c742bfe2b9dde0e4dc92b424e145dd86e3fdf3044919e4045c103353dbbd' 
  AND token = 'IPFBZREND8AysfNN7L6yrYL47QDbRJakTv/4/kjimPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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