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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45130f23b227e8d8d5df61543b94aa0794246f0136b3fe53570082c075e352dc' 
  AND token = 'UHBXKivAIdxhOzE57ukeL1kznTPxw8tEiX4sWts3Ru8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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