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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b6e2922b901f7277b7952d4c32a41fa1abd95a910916c5b3bb71dd6da90fe5b' 
  AND token = 'OIzfwllc6nXka36MODU8B+07L+IZLboH20/V49I/9Rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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