Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '860ca7de11cf2f4a0e7a8a35fad8b0c4ed3278ff1ec8cde18f3382dfa80d1dde' 
  AND token = 'hNBB53R0e5HJkKP5F5ydo67Lo3Ux97tjFF7tn+a9vnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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