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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cea62e5602f439fb0ef8f27923a1c462c40308238d9e8cc4c9bb424a52582aad' 
  AND token = '+Oot1xnMK15Q9L5+i+MFiCZe+N+H6hjq97u9xFJPx3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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