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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd180603ceb6a153a52b0f4ccf13912380c11cf71bd490e5304c41516a7723078' 
  AND token = '4qbMJY7gJOBHRGPmXI96cT3LMDTjn7HY46730TOnlUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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