SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e210617cfc944aeeb153d3975f79fdc0677cdf5290531f069eb48e6c7076c992' 
  AND token = 'cWP+nP/90LrhphS9/VEPmwuMKhf/FIBwpNKXqCYMqzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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