Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f66ccf78e0231a41e41471e6288eda910e58d07e40c488601097ca21cb67938a' 
  AND token = 'Jl/W+caaapKzhAcbINiZS8v3KHKEg0VlSFlMs6v0N8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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