Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c3fe90d42924906b5fe13a668acf4b3671a2ddd5e5c22f5873dad41a6a7100c' 
  AND token = 'eId1Y8McEzDr58kFMmdLsm9begaC1JBLukxgqv89FLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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