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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132604369a6ec0b056e9dc9b22c900d1d11a44e943da05aff48e37ad84087d7b' 
  AND token = 'zcb9Cg+YCpRtKNZJq7O3A51+C/MiIXU3KAo1WZrpcCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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