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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddf37a163be158ce55d3e2e9b7033644b6ce33cce817b8d9f2e886120610660c' 
  AND token = 'YzSq9qjWbmml0he83cPo8GYoENZhqsRatJezzSyVavo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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