Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4c9e93ee89320240805a533f0bbef3f286e0e211ab6d378ef5909345e3e6798' 
  AND token = 'A5YbFhTN7DCzJY+VLUHNU01X13nuv4599FjjSwXxTPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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