Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78d204e6fbd9ca9e763e912823d5e86c0cbc093e897d5775cd69856d55f18141' 
  AND token = 'q1oGiPP7ljacXAOkm2YXB4aPImfMDcV/KXDAesyUReM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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