SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2fbbd4d13a270994c0c95073216f9455a091cb7769d0a1c88d6eeecc5795f3c5' 
  AND token = 'piYg+dCz/zhQm4Pv9ccmnvYnZM28lwQ9AoHD6+8s2Fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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