Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80e2fce705d3a98ebb653085b10fea7d018adcbb2a5b0242bf0f2c219cbfbf18' 
  AND token = 'EoYSlGFQG/ADpiD74HHB8B5d5+VwWLeJc60BiT6DKN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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