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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b4a8e24375be6fd6075252eb5f3b5fc5e398eddb8ce1a4d50283e49aaa74e76' 
  AND token = 'ALNFSpV8EeybnMYmlSvM3Xc/MTM5JxCnEHneHJfVuvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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