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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d056c93afbd4c809dd29ff88353cc2bc01ae59d892a55b168a583615931f7af' 
  AND token = 'azOX/HcNtUTsWJQ1jjfRnzw/8n5pWUJjDzEXBdQpCiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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