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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b8d61248d95fb7e0f0d9f417db6872b01019edaf4a9b57c3135f1c0489c01c7' 
  AND token = 'cV2WFMRJ3hOOVPqK0nEzH93LdXSA5uH51FiaTeYlABQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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