Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e29fdd7a0b7e9d1024cc1a197b099504b776c0c8389dd2fd7def3de22a962dc9' 
  AND token = '4r1AdrlViEk67Ue1O/nDl/TNGhKHtbizeJqH2abqZHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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