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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6832f2e489280c6ee2698dd5160e72b4e8e8bc8bebd3af0761f706a615e0f31' 
  AND token = 'EJT+iG0/tMabPAZflqsmc4u6UJhQA7HVi5wTpJjKNQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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