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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '36dd44a1dfe05be97bd2d34d13f6810872f83cc2b9e56ec08141d8b29edc28da' 
  AND token = 'DdraHU5Bpf5f/xhjpUxzvS3OTHpVNEi5CfpI7y9J1ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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