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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54b11110274317795b8e7d2d25214b9133426c9ca4b1020e5359f2a9f7961061' 
  AND token = 'RmRSjNtqc+r/QVXCHTaThNLG3zswZdkPrSxr1SOt/Oc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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