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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2415d470fdf13279631dd84ef68c15c165f39de7066af2e0343e43ded1aa9c94' 
  AND token = 'lhCmrn77jX/DjM6kj28dkr/8r7YC3Wx6gbauH9OVWHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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